Independent Electronic Expansion Valve Driver | Emerson EXD-S16

Description

The Emerson/Alco EXD-S16 (PCN 804542) is an electronic controller for EX5, EX6, EX7, and EX8 expansion valves, designed for refrigeration and air conditioning systems. It automatically regulates refrigerant flow based on pressure and temperature readings to maintain optimal evaporator superheat, enhancing system efficiency and compressor protection.

Application: Electronic regulation of refrigerant flow

Refrigerants: R22, R407C, R134a, R404A, R410A

Power supply: 24 V AC ±10% (50/60 Hz) or 24 V DC (+10%, -0%)

Mounting: DIN rail

Temperature sensor input: NTC temperature probe (accuracy: approx. ±0.5 K)

Pressure sensor input: 4–20 mA input for pressure transmitters (-0.8 to 7 bar or 0 to 18 bar range)

Maximum valve cable length: 6 m, AWG 20/22

Digital input: 5 V DC / 5 mA

Rated current: 0.5 A for EX5/EX6, 0.75 A for EX7, 0.8 A for EX8

Motor outputs: 4 outputs for the stepper motors of EX5–EX8 valves

Alarm relay output: 24 V AC / 0.5 A, 10 VA

Transmitter power supply output: +24 V DC